Ash disposal apparatus



Oct. 18, 1932. c. s. coDY ET Al.

ASH DISPKOSAL APPARATUS Filed Nov. 2s. 195i 2 Sheets-Sheet l w/TNEs'sEs.-

C. S. CODY ETAL Asa mSPoSAI-J APPARATUS Caf'. 18, 1932.

Filed Nov. 25. 19:51

2 Sheets-Sheet 2 /N VEA/TOR Curioso conj, Bummbnvss B Y mln DONALD Moss-HART. y l l M A TTORNE Y Patented oct.' 1s, 1932 UNI-'ran STAT-Es PATENT OFFICE CIIIIIFFOIEIJ)v S. CODY, 0F SHARON HILL, B'URL A. DAVIS, 0F `PITTSBURGH, AND DONALD 3'. MOSSHART, OF LANSDOWNE, PENNSYLVANIA, ASSIGNORS T0 WESTINGHOUSE ELECTRIC AND MANUFACTURING C0MPANY,IA CORPORATION OFPENNSYLVANIA Asn DISPOSAL APPARATUS appncation mea Novembras, 1931. serial No. 577,358.

Ourinvention relates to combustion apparatus and more particularly to clinker or ash pits utilized for reception and storage `of ash discharged from fuel burning structure and it has for a broad object to provide apparatus of this character which is of irnproved construction and arrangement of parts.

In apparatus of this character',v heretofore known to us, it is customary to provide refuse supporting and crushing means within the lower portion of ash pits for grinding and removing from the pit the ash. This means is usually in the form of grinder rolls extending longitudinally of the pit and arranged with their axes substantially parallel. Heretofore in relatively long pits it has been found necessary to support the rolls intermediate their ends by bearings. To this end, a supporting structure is usually provided which extends transversely of the pit and be' .neath the grinder rolls and the bearings are carried by such supporting structure. Heretofore the bearings have been arranged with their centers in the same transverse plane. By reason of this construction, no part of the grinding surface of the rolls acts on the ash lying over and adjacent Athe bearings. Hence, the eiiiciency of operation of the rolls is lowered. Furthermore, in pits having more than one pair of intermediate supporting bearings, the ash will arch over between pairs, the inactive areas adjacent the bearings providing the supports for the arch. Such an arch materially interferes with the necessary free downward movement of the ash onto the grinding surface of the roll and hence the eiiiciency of operation is seriously lowing description and claims, taken in connection with Athe accompanying drawm forming a part of this application, in whc taken on the line IV-IV of Fig. 3'.

According to the preferred embodiment of our invention, which is shown on the accomd panying drawings, vwe provide an ash or clinker pit comprising longitudinally-extending side walls and transverse end walls. We provide also within the lower portion o'f the pit a pair of grinder rolls disposed longitudinally of the pit with their axesarranged substantially parallel to one another. \We A also provide bearings for supporting the rolls intermediate their ends for rotation about their respective axes and the bearings 'aie so arranged that a bearing for one roll is axiallyv spaced from a bearing for the opposite roll, whereby each bearing is" disposed 0pposite a grinding portion of the other roll. This construction provides eifective grinding areas for the entire length of the 'rolls and precludes the accumulation of ash at an point, such as would interfere with the e ectiveness of the rolls.

Referring now in detail to the construction illustrated, the referencel numeral 10 indicates a clinker or ash pit having upright side walls 11 and l2, and end walls 13 (only one of the latter being shown). A pair of parallel grinder rolls 14 and 15 extend longitudinally of the pit and are arranged in the lower ortion thereof. Ashes from a furnace innot shown) are deposited within the upper nortion of the pit and the rolls support such ash. The rolls are preferably mounted for rotation toward one another, and thereby f gradually grind out the ash from the pit.

Each of the rolls comprise a shaft section 16 extending longitudinally of the pit and cylindrical grinding sections 17 of unit Fig. 4 is a sectional view through aroll l dicated at 18.

length embracing and secured to the -shaft section. The portion of the shaft section receiving the grindin sections is squared as in- 'I e grinding sect-ions are made in halves to facilitate assembly on the shaft and are provided with squared inner surfaces engaging the squared portion of the shaft. Bolts 19 serve to receive the grinding sections to the shaft.

Each of the grinding sect-ions is hollowed out to provide annular grooves 20. A plurality of radially extending openings 21 extend through the grinding sections and open into the grooves 20. Grinding teeth 22 extend through the openings 21 and are provided at their inner ends with heads 23 which are larger than t-he openings 21 and thereby prevent the teeth from passing entirely through the openings. Filler pieces 24 fit within the grooves and engage the heads 23 to lhold firmly the teeth in position within the openlngs.

The rolls are rotatably supported intermediate their ends at one or more points by pairs of intermediate bearings 25 and 26, 'the earings 25 supporting the roll 14 and the bearings 26 the roll 15 (see Fig. 1). The shaft sections 16 of each of the rolls are turned to provide journals 27 to receive their respective bearings.

Each pair of bearings 25-and 26 is carried by a supporting structure 28 extending transversely of the pit and secured at its opposite ends to the supporting structure for the side Walls 11 and 12.

As will be observed from an examination of Fig. 1, the bearings 25 and 26 of each pair are disposed in offset relation with respect to one another, and that by reason of such relation the bearing for each roll is opposite to grinding teeth 22 of the other roll. By reason of this construction, ash adjacent a bearing will be acted upon by the teeth of the otherroll, thus precluding the accumulation of ash adjacent a bearing and providing for the effective operation of the rolls.

While we have shown our invention in but one form. it will be obvious to those skilled in the art that it is not so limited but is susceptible of various other changes and modifications without departing. from the spirit thereof, and we desire therefore, that only such limitations shall be placed thereupon as are imposed by the prior art or as are specifically set forth in the appended claims.

What we claim is:

1. In combustion apparatus, the combination of side and end Walls defining an ash or clinker pit; a plurality of grinder rolls disposed longitudinally of the pit in the lower portion thereof with their axes substantially parallel; bearings for supporting the rolls intermediate their ends for rotation about their respective axes; the bearings being so arranged that a bearing for one roll is axially spaced from a bearing for the o posite roll, whereby each bearing is dispose opposite a grinding portion of the other roll.

2. In combustion apparatus, the combination of side and end walls defining an ash or clinker pit; a plurality of grinder rolls disposed longitudinally of the pit in the lower portion thereof with'their axes substantially parallel; an intermediate bearing supporting structure extending transversely beneath the grinder rolls and secured at its end to the side walls of the pit; a pair of bearings, one for each roll, carried by the supporting structure and supporting their respective rolls for rotation about their respective axes; the bearing for one roll being disposed in offset relation with respect to the bearing of the other roll, wherebya bearing for one roll is always opposite a grinding surface of the other roll.

3. In combustion apparatus, the combination of side and end walls defining an ash or clinker pit; a plurality of grinder rolls disposed longitudinally of the pit in the lower portion thereof With their axes substantially parallel; each grinder roll having tooth portions and at least one intermediate journal portion between tooth portions; supporting bearings for receiving the journal portions; the rolls and bearings being so arranged that a bearing for one roll is disposed opposite to a tooth portion of the other roll. V

In testimony whereof, we have hereunto subscribed our names.

Nov. 5, 1931.

CLIFFORD S. CODY. Nov. 16, 1931.

BURL A. DAVIS. Nov. 3, 1931.

DONALD J. MOSSHART. 

